High Voltage Engineering
2010-2011 - ELE3311 - 5 ECTS

Expected learning outcomes

The students should acquire theoretical knowledge and practical skills for calculating electrical stress on high voltage electrical insulation material with simple electrode configurations.


  • Know the structure of the transmission and distribution network in Norway and Sweden.
  • Knowledge about gas, liquid and solid insulation material used for electrical insulation in high voltage lines, cables, transformers and other equipment.
  • Knowledge about simplified models for calculating overvoltage due to switching and lightning.


  • Understand and behave due to a safety instruction.
  • Do practical impuls-, dc- and ac- high voltages test of objects in laboratory.
  • Skills to make technical reports so they are possible to redo.

General competence/universal knowledge

  • Discuss environmental and social issues due to electrical production, transmission and distribution and use/consumption.


  • Electrostatic fields calculations. (Plane, sphere and cylindrical configurations.)
  • Electrical breakdown in gases (Townsend criteria) and in electronegativ gases.
  • Paschen’s law
  • Insulating liquids (testing, aging and oxidation) and factors influencing the dielectric strength.
  • Switchgear, overhead lines, glass and porcelain isolators, High voltage fuses, High voltage cables.
  • Lightning overvoltage calculation
  • Switching overvoltage calculation
  • High voltage test technique

Teaching Methods

Laboratory work
Net Support Learning
Mandatory assignments

Form(s) of Assessment

Written exam, 3 hours

Grading Scale

Alphabetical Scale, A(best) – F (fail)